move disappearing message jobs to its concurrent queue.

Session/Conversations/Context Menu/ContextMenuVC+ActionView.swift

@@ -118,7 +118,8 @@ extension ContextMenuVC {
             
             subtitleLabel.isHidden = false
             subtitleWidthConstraint.isActive = true
-            let timeToExpireInSeconds: TimeInterval =  (expiresStartedAtMs + expiresInSeconds * 1000 - Double(SnodeAPI.currentOffsetTimestampMs())) / 1000
+            // To prevent a negative timer
+            let timeToExpireInSeconds: TimeInterval =  max(0, (expiresStartedAtMs + expiresInSeconds * 1000 - Double(SnodeAPI.currentOffsetTimestampMs())) / 1000)
             subtitleLabel.text = String(format: "DISAPPEARING_MESSAGES_AUTO_DELETES_COUNT_DOWN".localized(), timeToExpireInSeconds.formatted(format: .twoUnits))
             
             timer = Timer.scheduledTimerOnMainThread(withTimeInterval: 1, repeats: true, block: { [weak self] _ in

SessionUtilitiesKit/JobRunner/JobRunner.swift

@@ -262,7 +262,8 @@ public final class JobRunner: JobRunnerType {
                 isTestingJobRunner: isTestingJobRunner,
                 jobVariants: [
                     jobVariants.remove(.expirationUpdate),
-                    jobVariants.remove(.getExpiration)
+                    jobVariants.remove(.getExpiration),
+                    jobVariants.remove(.disappearingMessages)
                 ].compactMap { $0 }
             ),